Characteristics of supported nano-TiO2/ZSM-5/silica gel (SNTZS): Photocatalytic degradation of phenol

A novel approach of preparing TiO2 films at low temperature and its application in photocatalytic degradation of methyl orange

“…On the other hand, the chances of reaction of MO with electrons, holes and OH • are less with the decrease in MO concentration, therefore the degradation of MO in a low concentration could not be effective by using photocatalyst. The phenomenon was also found in the photocatalytic treatment of other pollutants [32]. Too high pollutant concentration can cost more time and catalyst, and also produces lower degradation rate.…”

Roles of titanium dioxide and ion-doped titanium dioxide on photocatalytic degradation of organic pollutants (phenolic compounds and dyes) in aqueous solutions: A review

“…These compounds are usually found in wastewater discharged from a variety of industries, such as petroleum refineries, chemical synthesis, plastics, coke plants, dyes, pulp and paper, textiles, detergents, pharmaceutics, as well as pesticides and herbicides synthesis [47,48]. Phenolic compounds can also arise from natural sources in the aquatic environment, such as algal secretion, lignin transformation, hydrolysable tannins and flavanoids, and humidification processes at low concentration [49].…”

“…Introducing iron into the crystal structure of TiO 2 may also improve the wettability of the nanoparticles, thus avoiding high aggregation in the Table 3 Summary of studies on photocatalytic degradation of phenolic compounds in wastewater in the presence of TiO2 as photocatalyst. Zainudin et al [49] • High photocatalytic activity of SNTZS was due to its large surface area (275.7 m 2 /g), high crystalline quality of the synthesized catalyst, small particle size, and low electron-hole pair recombination rate. Phenol…”

Preparation, characterization and photocatalytic activity evaluation of micro- and mesoporous TiO2/spherical activated carbon

“…Powder type TiO 2 has high photocatalytic activity due to its large surface area and high degree of dispersion in reaction media. However, the powder type TiO 2 leads to several problems such as: (1) the difficult process of filtration or separation of the powder from the solution after a photocatalytic reaction, (2) the aggregation of particles in suspension, in the case of high loadings, and (3) its application to continuous flow systems is quite challenging [13][14][15][16][17]. Due to the aforementioned problems, photocatalysts (e.g.…”

“…Due to the aforementioned problems, photocatalysts (e.g. TiO 2 ) have been immobilized on various supports such as silica gel, alumina, and activated carbon [13,14,[16][17][18]. Especially, activated carbon has been extensively studied as a support for TiO 2 photocatalyst [14].…”